Samuel b



(No Model.)

S. B. JENKINS.

ELECTRIC HEATER.

No. 519,043. Patented May 1, 1894.

0 am ig-eeaeeQee ms NATIONAL u'mormrume COMPANY.

UNITED STATES PATENT OFFICE.

SAMUEL B. JENKINS, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE AMERICAN ELECTRIC HEATING COMPANY, OF SAME PLACE.

ELECTRIC HEATER.

SPECIFICATION forming part of Letters Patent No. 519,043, dated May 1, 1894. Application filed March 31, 1893. Renewed February 20, 1894. Serial No. 500,863. (No model.)

To all whom it may concern..-

Be it known that I, SAMUEL B. JENKINS, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts,have invented certain new and useful Improvements in Electric Heaters; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. I

The object of this invention is to provide an improved combined core and casing for the heating wire or equivalent resistance of an electric heater, the same being adapted to form part of a receptacle or vessel and pr eferably the bottom thereof. To this end I make use of the construction and combination of parts hereinafter more particularly set forth and claimed.

In the accompanying drawings Figure 1 represents a vertical section of the lower part of a receptacle provided with a bottom embodying my invention. Fig. 2 represents a similar view of a bottom adapted to such use but modified in form. Fig. 3 representsasimilar view of a casing and core constructed according to Fig. 2, but without the heating Wire and not yet having either of the peripheral edges of the disks turned over. Fig. trepresents a similar view of another modification; and Fig. 5 represents a' plan view of the wire or other conductor and the core on which it is wound.

A and B designate two parallel metallic disks which as shown in Fig. 1 are pressed inwardly at the center against each other; or as shown in Figs.'3 and 5 are provided at the center with a circular interposed washer C. A solid rivet D, Figs. 1 and 3, passes through the said disks at the central point of each and fastens them together. Or an annular rivet D, as shown in Fig. 4, may be employed for this purpose, leaving of course an opening d through it. The washer or depressed meeting parts of the disks with the rivet will brace the said disks; and in addition constitute a core on which an insulated conductor E, forming part of an electric circuit, 4

is wound. As shown in Figs. 1 and 2, after such winding, the edge of one of the said disks is turned over on the edge of the other disk or the edges of both disks may be turned over to meet each other, thus completing,in either instance, a protecting casing for the said wire or other conductor. When an electric current is'sent through the latter there will be an evolution of heat as usual in such cases and this will be communicated to the said core and casing and radiated therefrom. The latter need not be used as the bottom of a receptacle, but in any other part thereof or wherever available for heating purposes.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A pair of disks provided with a central.

rivet and core, in combination with an electric conductor forming part of an electric circuit and wound on the said core between the said disks, the edge of one of the said disks being turned over on the other to complete the inclosure of the said conductor substantially as set forth.

2. The disks A and B pressed together at their central parts to form a core, in combination with a rivet passing through the center of the said core, and an electric conductor forming part'of an electric circuit, and wound on the said core, the edge of one of the said disks being turned over on the edge of the other disk to complete the casing substantially as set forth.

SAMUEL B. JENKINS.

Witnesses:

EDWIN W. PIERCE, PELATIAH R. TRIPP. 

